And where does it say that the Holy Spirit is God?
The Holy Spirit mentioned on equal level with God
Matt. 28:19, “Go therefore and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit,”
2 Cor. 13:14, “The grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit, be with you all.”
Eph. 4:4-6, “There is one body and one Spirit, just as also you were called in one hope of your calling; one Lord, one faith, one baptism, one God and Father of all who is over all and through all and in all.”
2 Cor. 3:16-18, “but whenever a man turns to the Lord, the veil is taken away. Now the Lord is the Spirit; and where the Spirit of the Lord is, there is liberty. But we all, with unveiled face beholding as in a mirror the glory of the Lord, are being transformed into the same image from glory to glory, just as from the Lord, the Spirit.”
The Holy Spirit is referred to as a person by scripture
Who
Rom. 8:11, “But if the Spirit of Him who raised Jesus from the dead dwells in you, He who raised Christ Jesus from the dead will also give life to your mortal bodies through His Spirit who indwells you.”
John 6:63, “It is the Spirit who gives life; the flesh profits nothing; the words that I have spoken to you are spirit and are life.”
1 John 5:6, “And it is the Spirit who bears witness, because the Spirit is the truth.”
See also 1 Cor. 2:12; 2 Tim. 1:14;
He
John 14:26, "These things I have spoken to you, while abiding with you. “But the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all that I said to you.”
Himself
Rom. 8:16, “The Spirit Himself bears witness with our spirit that we are children of God,”
Rom. 8:26, “And in the same way the Spirit also helps our weakness; for we do not know how to pray as we should, but the Spirit Himself intercedes for us with groanings too deep for words;”